Merge branch 'dev'

1 files changed, 80 insertions, 0 deletions

diff --git a/modules/core/c++/environment.hpp b/modules/core/c++/environment.hpp
new file mode 100644
index 0000000..d8aa9ae
--- /dev/null
+++ b/modules/core/c++/environment.hpp
@@ -0,0 +1,80 @@
+#pragma once
+
+#include <forstio/error.hpp>
+#include <filesystem>
+#include <cstdlib>
+
+namespace kel {
+namespace lbm {
+
+struct environment {
+	std::string name;
+	
+	std::filesystem::path lbm_dir;
+	std::filesystem::path data_dir;
+};
+
+saw::error_or<environment> setup_lbm_env(const std::string_view name){
+	namespace fs = std::filesystem;
+
+	const char* home_dir = std::getenv("HOME");
+	if(not home_dir){
+		return saw::make_error<saw::err::not_found>("Couldn't find home dir");
+	}
+
+	environment env;
+
+	env.lbm_dir = std::filesystem::path{home_dir} / ".lbm";
+
+	{
+		// Set default data location to "${lbm_dir}/data"
+		env.data_dir = env.lbm_dir / "data";
+		// LBM Data Location
+		auto lbm_dir_config = env.lbm_dir / "data_dir_location.txt";
+		if( fs::exists(lbm_dir_config) && fs::is_regular_file(lbm_dir_config) ){
+			std::ifstream file{lbm_dir_config};
+
+			if(file.is_open()){
+				std::stringstream buffer;
+				buffer <<file.rdbuf();
+				env.data_dir = fs::path{buffer.str()};
+			}
+		}
+	}
+
+	return env;
+}
+
+/**
+ * Returns the default output directory.
+ * Located outside the project dir because dispatching build jobs with output data in the git directory
+ * also copies simulated data which takes a long time.
+ */
+saw::error_or<std::filesystem::path> output_directory(){
+	namespace fs = std::filesystem;
+
+	const char* home_dir = std::getenv("HOME");
+	if(not home_dir){
+		return saw::make_error<saw::err::not_found>("Couldn't find home dir");
+	}
+
+	auto lbm_dir = std::filesystem::path{home_dir} / ".lbm";
+
+	{
+		auto lbm_dir_config = lbm_dir / "data_dir_location.txt";
+		if( fs::exists(lbm_dir_config) && fs::is_regular_file(lbm_dir_config) ){
+			std::ifstream file{lbm_dir_config};
+
+			if(file.is_open()){
+				std::stringstream buffer;
+				buffer <<file.rdbuf();
+				return fs::path{buffer.str()};
+			}
+		}
+	}
+
+	return lbm_dir / "data";
+}
+
+}
+}